JP2008166242A - Plasma display panel and manufacturing method thereof - Google Patents

Abstract

Disclosed are a plasma display panel and a method for manufacturing the same, which can simplify a manufacturing process and improve discharge efficiency.
A plasma display panel of the present invention includes an upper substrate, a plurality of sustain electrodes and a scan electrode arranged in parallel on the upper substrate, and a dielectric surrounding the sustain electrode and the scan electrode. A lower substrate 211 disposed to face the upper substrate 111, and a plurality of address electrodes 212 arranged on the lower substrate 211 so as to intersect the sustain electrodes 112a and the scan electrodes 112b. The electrode 112a and the scanning electrode 112b are connected by a bridge 112c.
[Selection] Figure 4

Description

  The present invention relates to a plasma display panel and a manufacturing method thereof, and more particularly, to a plasma display panel and a manufacturing method thereof that can simplify a manufacturing process and improve discharge efficiency.

 A plasma display panel (PDP: Plasma Display Panel) is a flat display device that displays characters or images by causing phosphors to emit light by plasma generated during gas discharge, such as a liquid crystal display (LCD) or a liquid crystal display (LCD). Compared with field emission display (FED), it has higher luminance and light emission efficiency, and has a wider viewing angle. Therefore, it attracts attention as an alternative to cathode ray tube (CRT) display. Collecting.

  Plasma display panels are classified into a direct current (DC) type and an alternating current (AC) type according to the structure of pixels arranged in a matrix and the waveform of a driving voltage. In the direct current type, all electrodes are exposed to the discharge space, and charge transfer between the corresponding electrodes is performed directly, whereas in the alternating current type, at least one of the corresponding electrodes is a dielectric. The charge is not directly transferred between the corresponding electrodes.

  The plasma display panel is divided into a counter discharge structure and a surface discharge structure according to a method of forming electrodes for discharge. In the counter discharge structure, an address discharge for selecting a pixel and a sustain discharge for maintaining the discharge are generated between the scan electrode (anode) and the address electrode (cathode), whereas the surface discharge structure has an address that intersects each other. An address discharge for selecting a pixel is generated between the electrode and the scan electrode, and a sustain discharge for maintaining the discharge is generated between the scan electrode and the sustain electrode.

 Here, the structure of a conventional plasma display panel will be described with reference to FIGS. FIG. 1 is a perspective view for explaining an example of a conventional plasma display panel, and FIG. 2 is a sectional view showing a sectional structure of one pixel of the plasma display panel shown in FIG. The plasma display panel is shown.

  Referring to FIGS. 1 and 2, a plurality of sustain electrodes 12 a and scan electrodes 12 b covered with a dielectric 15 and a protective film 16 are formed on the upper substrate 11 in parallel. The sustain electrode 12a and the scan electrode 12b are composed of transparent electrodes 13a and 13b made of ITO (Indium Tin Oxide) or the like, and metal electrodes 14a and 14b for increasing conductivity.

  A plurality of address electrodes 22 covered with a dielectric 23 are formed on the lower substrate 21. A partition 24 is formed on the dielectric 23 above the plurality of address electrodes 22 in parallel with the address electrode 22, and a fluorescent layer 25 is formed on both sides of the partition 24 and on the dielectric 23.

  Gas for forming plasma in the sealed discharge space 30 formed by the barrier ribs 24 in which the upper substrate 11 and the lower substrate 21 are bonded so that the address electrodes 22, the sustain electrodes 12 a, and the scan electrodes 12 b are orthogonal to each other. Is sealed to form a plurality of pixels.

  In the conventional plasma display panel configured as described above, each layer is formed on the upper substrate 11 and the lower substrate 21 and then patterned to form a transparent electrode, a metal electrode, a dielectric, a protective film, and the like. A plasma display panel is manufactured by assembling the upper substrate 11 and the lower substrate 21. However, the conventional plasma display panel manufacturing method described above has a problem in that the manufacturing process becomes complicated and the use of materials increases, resulting in an increase in manufacturing cost. Further, since the dielectric 15 and the protective film 16 are formed on the upper substrate 11 in the discharge space 30, there is a problem in that the transmittance of light emitted from the fluorescent layer 25 is lowered and the light emission efficiency is lowered. It was.

Korean Published Patent No. 10-2006-0093534 Korean Published Patent No. 10-2006-0102426 Korean Published Patent No. 10-2001-0051355 Japanese Patent Publication No. 11-297209 Japanese Patent Publication No. 10-26946

  An object of the present invention is to provide a plasma display panel having a simple manufacturing process and high luminous efficiency, and a manufacturing method thereof.

 In order to achieve the above object, a plasma display panel according to the present invention includes a first substrate, a plurality of first and second electrodes arranged in parallel on the first substrate, the first electrode, A first dielectric surrounding the second electrode and connecting between the first electrode and the second electrode; and formed on the first dielectric on a surface of the first electrode and the second electrode. A protective film, a second substrate disposed so as to face the first substrate, and a plurality of third electrodes arranged on the second substrate so as to intersect the first electrode and the second electrode; And a second dielectric formed on the third electrode.

  In order to achieve the above object, a method of manufacturing a plasma display panel according to the present invention includes a first metal electrode, a second electrode, and a first electrode and a second electrode by patterning a metal sheet. Forming a bridge connecting the first electrode and the second electrode, oxidizing the surfaces of the first electrode and the second electrode to a predetermined thickness, forming a dielectric, and attaching the first electrode and the second electrode to the substrate And a step of forming a protective film on the dielectric.

  The plasma display panel of the present invention forms a sheet-like scan electrode and a sustain electrode by patterning a metal sheet, connects the scan electrode and the sustain electrode to each other by a bridge, and a metal oxide is formed on the surface thereof. A dielectric material is formed and bonded to the upper substrate.

  As a result, the steps for manufacturing the scan electrode and the sustain electrode can be reduced as compared with the prior art, and the assembly becomes easier, so that the manufacturing cost can be effectively reduced. In addition, since the opposed surfaces of the scan electrode and the sustain electrode are increased as compared with the conventional case, the discharge voltage can be reduced. Furthermore, the light emitting region can be sufficiently secured by increasing the distance between the scan electrode and the sustain electrode. Further, by exposing the substrate to the discharge space, the light transmittance can be increased and the discharge efficiency can be improved.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The following examples are provided so that those skilled in the art can fully understand the present invention, and various modifications are possible. The scope of the present invention is as follows. However, the present invention is not limited to these examples.

  FIG. 3 is a perspective view for explaining the structure of a plasma display panel according to a preferred embodiment of the present invention. FIG. 4 is a cross-sectional view showing a cross-sectional structure of one pixel of the plasma display panel shown in FIG. is there.

  3 and 4, a plurality of sustain electrodes 112a and a plurality of scan electrodes 112b are formed on the upper substrate 111 in parallel. The sustain electrode 112 a and the scan electrode 112 b are surrounded by the dielectric 113. As will be described in detail later, the sustain electrode 112a and the scan electrode 112b are connected to each other by a dielectric bridge 112c. Further, protective films 114 are formed on the dielectrics 113 formed on the surfaces of the sustain electrodes 112a and the scan electrodes 112b, respectively.

  A plurality of address electrodes 212 are formed on the lower substrate 211 so as to intersect the sustain electrodes 112 a and the scan electrodes 112 b, and a dielectric 213 is formed on the address electrodes 212. A partition wall 214 is formed on the dielectric 213 above the address electrode 212 in parallel with the address electrode 212, and a fluorescent layer 215 is formed on both side surfaces of the partition wall 214 and on the dielectric 213.

  Then, when the upper substrate 111 and the lower substrate 211 are assembled so that the sustain electrodes 112 a and the scan electrodes 112 b and the address electrodes 212 are orthogonal to each other, a discharge space 220 is formed by the barrier ribs 214. A plurality of pixels are configured by sealing a gas for forming plasma in the discharge space 220. As a gas for forming plasma, an inert mixed gas such as He + Xe, Ne + Xe, He + Xe + Ne can be used.

  Here, the structure of the sustain electrode 112a and the scan electrode 112b will be described with reference to FIGS. As shown in FIG. 5 a, the sustain electrode 112 a and the scan electrode 112 b are provided by a metal sheet 112 having a certain thickness made of aluminum (Al) or the like, and are connected to each other by a bridge 112 c of the metal sheet 112. For example, by patterning the metal sheet 112 into the shape shown in FIG. 5a by a photo and etching process, the scan electrode 112a and the sustain electrode 112b arranged in parallel at regular intervals, and the scan electrode 112a and the sustain electrode 112b Can be formed with the bridge 112c.

  The dielectric 113 can be formed so as to surround the entire surface of the sustain electrode 112a and the scan electrode 112b, or can be formed only on the remaining surface except the surface in contact with the upper substrate 111. The dielectric 113 can be formed of an oxide containing metal atoms of the sustain electrode 112a and the scan electrode 112b. For example, when the patterned metal sheet 112 is oxidized to a certain thickness as shown in FIG. 5a, the surfaces of the sustain electrode 112a and the scan electrode 112b are oxidized as shown in FIG. Is formed. At this time, when the width D1 of the sustain electrode 112a and the scan electrode 112b is made wider than the width D2 of the bridge 112c as shown in FIG. 5a and the oxidation process is performed so that the bridge 112c is completely oxidized, as shown in FIG. 5b. As described above, at the same time that the dielectric 113 made of metal oxide is formed on the surfaces of the sustain electrode 112a and the scan electrode 112b, the bridge 112c is completely changed to oxide. As a result, the sustain electrode 112a and the scan electrode 112b are structurally connected to each other by the bridge 112c changed to an oxide, but are electrically separated.

  Next, the manufacturing method of the plasma display panel of the present invention described above will be described with reference to the drawings. The plasma display panel of the present invention configured as described above can be manufactured by the following method.

  6A to 6D are cross-sectional views for explaining a method of manufacturing a plasma display panel according to the first embodiment of the present invention, which will be described with reference to FIGS. 5a and 5b.

  First, referring to FIGS. 5a and 6a, a metal sheet 112 having a certain thickness made of aluminum Al or the like is patterned, and a scan electrode 112a and a sustain electrode 112b arranged in parallel at regular intervals, and a scan electrode 112a. And a sustaining electrode 112b are formed. 6A is a cross-sectional view of the A1-A2 portion of FIG. 5A, in which the scan electrode 112a, the sustain electrode 112b, and the bridge 112c are integrally connected in a sheet shape.

Next, referring to FIGS. 5b and 6b, the dielectric 113 made of a metal oxide such as Al ₂ O _{3 is obtained} by oxidizing the surfaces of the sustain electrode 112a and the scan electrode 112b by a predetermined thickness by a predetermined oxidation process. Form. At this time, when the oxidation process is performed so that the bridge 112c is completely oxidized, the sustain electrode 112a and the scan electrode 112b are structurally connected to each other but electrically separated from each other. It is possible. FIG. 6B is a cross-sectional view taken along line A11-A12 of FIG. 5B.

  Next, referring to FIG. 6 c, the sheet-like sustain electrode 112 a and the scan electrode 112 b connected together by the bridge 112 c are bonded to the upper substrate 111 using the adhesive 115.

  6d, a protective film 114 is formed on the dielectric 113 with magnesium oxide (MgO) or the like. At this time, the protective film 114 can be formed on the entire surface including the dielectric 113.

  As described above, in the plasma display panel according to the first embodiment of the present invention, the metal sheet 112 is first patterned to connect the scan electrode 112a and the sustain electrode 112b and the scan electrode 112a and the sustain electrode 112b. 112c. Then, the surfaces of the scan electrode 112a and the sustain electrode 112b connected to each other by the bridge 112c are oxidized to form the dielectric 113, and then bonded to the upper substrate 111 using the adhesive 115. In this case, since the surfaces of scan electrode 112a and sustain electrode 112b are all surrounded by dielectric 113, dielectric 113 is interposed between upper substrate 111 and scan electrode 112a and sustain electrode 112b.

  Next, a method for manufacturing a plasma display panel according to the second embodiment of the present invention will be described with reference to FIG. 7a to 7d are cross-sectional views illustrating a method for manufacturing a plasma display panel according to a second embodiment of the present invention.

  First, referring to FIG. 7a, a metal sheet 312 having a certain thickness made of aluminum (Al) or the like is patterned, and a scan electrode 312a and a sustain electrode 312b arranged in parallel at regular intervals, and a scan electrode 312a, A bridge 312c connecting the sustain electrode 312b is formed. At this time, the scan electrode 312a, the sustain electrode 312b, and the bridge 312c are integrally connected in a sheet shape.

  Next, referring to FIG. 7 b, the sheet-like sustain electrode 312 a and the scan electrode 312 b connected together by the bridge 312 c are bonded to the upper substrate 311 using an adhesive 315.

Referring to FIG. 7c, a predetermined oxidation process is performed to oxidize the surfaces of the sustain electrode 312a and the scan electrode 312b by a predetermined thickness to form a dielectric 313 made of a metal oxide such as Al ₂ O _3. Form. At this time, if the oxidation process is performed so that the bridge 312c is completely oxidized, the sustain electrode 312a and the scan electrode 312b are structurally connected to each other, but can be electrically separated. become.

  Next, referring to FIG. 7 d, a protective film 314 is formed on the dielectric 313 with magnesium oxide (MgO) or the like. At this time, the protective film 314 can be formed on the entire surface including the dielectric 313.

  As described above, in the plasma display panel according to the second embodiment of the present invention, the metal sheet 312 is patterned to connect the scan electrode 312a and the sustain electrode 312b, and the bridge 312c connecting the scan electrode 312a and the sustain electrode 312b. After the film is formed, it is bonded to the upper substrate 311 using an adhesive 315. Then, an oxidation process is performed so that the bridge 312c is completely oxidized, and a dielectric 313 made of a metal oxide is formed on the surfaces of the scan electrode 312a and the sustain electrode 312b. In this case, since the dielectric 313 is formed only on the remaining surface excluding the surface in contact with the upper substrate 311, no dielectric is interposed between the upper substrate 311 and the scan electrode 312a and the sustain electrode 312b.

  In the plasma display panel configured as described above, a unit frame is time-divided into a plurality of subfields, and an initialization period, an address period, and a sustain discharge period are sequentially performed in each subfield. An image can be displayed. At this time, during the initialization period, the address period, and the sustain discharge period, a drive signal having a predetermined voltage waveform is applied to the sustain electrode, the scan electrode, and the address electrode.

  The best embodiment of the present invention has been disclosed through the detailed description and the drawings. The terminology is used merely for the purpose of describing the present invention and not for limiting the meaning or limiting the scope of the present invention as set forth in the claims. Therefore, those skilled in the art will understand that various modifications and other equivalent embodiments are possible. Therefore, the true technical protection scope of the present invention should be determined by the technical idea of the appended claims.

It is a perspective view for demonstrating the structure of the conventional plasma display panel. It is sectional drawing for demonstrating the structure of the conventional plasma display panel. It is a perspective view for demonstrating the structure of the plasma display panel based on this invention. It is sectional drawing for demonstrating the structure of the plasma display panel based on this invention. It is a top view for demonstrating the structure of the sustain electrode of this invention, and a scanning electrode. It is a top view for demonstrating the structure of the sustain electrode of this invention, and a scanning electrode. It is sectional drawing for demonstrating the manufacturing method of the plasma display panel based on 1st Example of this invention. It is sectional drawing for demonstrating the manufacturing method of the plasma display panel based on 1st Example of this invention. It is sectional drawing for demonstrating the manufacturing method of the plasma display panel based on 1st Example of this invention. It is sectional drawing for demonstrating the manufacturing method of the plasma display panel based on 1st Example of this invention. It is sectional drawing for demonstrating the manufacturing method of the plasma display panel based on 2nd Example of this invention. It is sectional drawing for demonstrating the manufacturing method of the plasma display panel based on 2nd Example of this invention. It is sectional drawing for demonstrating the manufacturing method of the plasma display panel based on 2nd Example of this invention. It is sectional drawing for demonstrating the manufacturing method of the plasma display panel based on 2nd Example of this invention.

Explanation of symbols

111 Upper substrate 112a Sustain electrode 112b Scan electrode 112c Bridge 113 Dielectric 114 Protective film 211 Lower substrate 212 Address electrode 213 Dielectric 214 Partition 215 Fluorescent layer 220 Discharge space

Claims (10)

A first substrate;
A plurality of first and second electrodes arranged in parallel on the first substrate;
A first dielectric surrounding the first electrode and the second electrode and connecting between the first electrode and the second electrode;
A protective film formed on the first dielectric on the surfaces of the first electrode and the second electrode;
A second substrate disposed to face the first substrate;
A plurality of third electrodes arranged on the second substrate so as to intersect the first electrode and the second electrode;
A plasma display panel, comprising: a second dielectric formed on the third electrode.  The plasma display panel according to claim 1, wherein the first dielectric is formed of an oxide containing metal atoms of the first electrode and the second electrode.  The plasma display panel according to claim 1, further comprising an adhesive interposed between the first substrate and the first electrode and the second electrode.  4. The plasma display panel according to claim 1, wherein the first electrode, the second electrode, and the first dielectric are in a sheet form. 5. Forming a first electrode and a second electrode and a bridge connecting the first electrode and the second electrode by patterning a metal sheet;
Oxidizing the surfaces of the first electrode and the second electrode by a predetermined thickness to form a dielectric;
Bonding the first electrode and the second electrode to a substrate;
Forming a protective film on the dielectric, and manufacturing the plasma display panel.  The method of manufacturing a plasma display panel according to claim 5, wherein the metal sheet is made of aluminum.  7. The method of manufacturing a plasma display panel according to claim 5, wherein a width of the bridge is smaller than a width of the first electrode and the second electrode.  8. The method of manufacturing a plasma display panel according to claim 5, wherein in the step of forming the dielectric, an oxidation process is performed so that the bridge is completely oxidized.  9. The method of manufacturing a plasma display panel according to claim 5, wherein an adhesive is used to bond the first electrode and the second electrode to the substrate.   6. The dielectric is formed by oxidizing the surfaces of the first electrode and the second electrode by a predetermined thickness after bonding the first electrode and the second electrode to the substrate. The manufacturing method of the plasma display panel of any one of thru | or thru | or 9.

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